So, I have only ever played tzeentch and khorne. With a load of bitz and unassembled models, I was thinking of scratch building some Noise boys. They seem like decent troops, assault weapons, I5, the blast master! So honestly, are they worth the 25 a pop? I want to make a Tzeentch/slannesh mix. Keeping only TS and EC as my troops to be an advancing gunline. I was thinking something like this;

1 DP, wings, Tzeentch, warptime
9+1 thousand sons, sorcerer with doombolt
2*6 noise marines each with blast master
2 obliterators

I think this should be set for 1K. A nice advancing wall of pain.